The atom of an element has electrons in the shell. What will be the atomic number of that element? Name the element.
Important Questions on Structure of the Atom
An old man and a scientist were talking about a deserted house. The old man was sure that it was haunted by ghosts, but the scientist discarded the view saying no one had ever seen a ghost. The old man was annoyed and challenged the scientist about existence of atoms, sub-atomic particles which also could not be seen. (VBQ) Read the given passage and answer the following questions.
How can existence of sub-atomic particles be verified?
An old man and a scientist were talking about a deserted house. The old man was sure that it was haunted by ghosts, but the scientist discarded the view saying no one had ever seen a ghost. The old man was annoyed and challenged the scientist about existence of atoms, sub-atomic particles which also could not be seen. (VBQ) Read the given passage and answer the following questions.
Whose view point do you support and why?
Explain the properties of cathode rays with the help of examples (and diagrams, if required).
How was electron discovered? Explain briefly.
Give experiments to show that cathode rays:
- Travel in straight line.
Give experiments to show that cathode rays:
consist of material particles.
Give experiments to show that cathode rays:
carry a negative charge.
Describe Thomson's model of the atom.
